Is Component::Pcap a Wheel?

Jonathan S. Polacheck wrote:

Nosing around in the mailing list archive I find;

"Re: Prioritizing Event Loops

Martijn van Beers
Fri, 18 Jan 2008 11:37:22 -0800
<snip>
In POE, all your external data, whether from a socket or a file, or
something else entirely, enters your app through a POE::Wheel (you might
not be aware of having one, since it is mostly hidden inside
POE::Component::Server::TCP). How the wheel gets the data is supposed to be
abstracted away.
</snip>"

So POE::Component::Pcap is a wheel?  Is there a way to look at the code and
tell if a component is a wheel or not?

Jon